[wip ]move to letter_opener in ocid poc

[RoyShravani]

Description

[Please describe what this change achieves]

Issues Resolved

[List any existing issues this PR resolves, or any Discourse or
StackOverflow discussions that are relevant]

Check List

• New functionality includes tests
• All buildkite tests pass
• Full omnibus build and tests in buildkite pass
• All commits have been signed-off for the Developer Certificate of Origin. See https://github.com/chef/chef/blob/main/CONTRIBUTING.md#developer-certification-of-origin-dco
• PR title is a worthy inclusion in the CHANGELOG

[netlify]

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqube-for-infrastructure-prod]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube